samplecode.php

Professional PHP5 code for this book

<?php

  interface Band {
     public function getName();
     public function getGenre();
     public function addMusician();
     public function getMusicians();
  }

  interface Musician {
     public function addInstrument();
     public function getInstruments();
     
     public function assignToBand();
     public function getMusicianType();
  }

  interface Instrument {
     public function getName();
     public function getCategory();
  }

  class Guitarist implements Musician {
  
    private $last;
    private $first;
    private $musicianType;
  
    private $instruments;
    private $bandReference;
    
    function __construct($first, $last) {
       $this->last = $last;
       $this->first = $first;
       $this->instruments = array();
       $this->musicianType = "guitarist";
    }
  
    public function getName() {
      return $this->first . " " . $this->last;
    }
    
    public function addInstrument(Instrument $instrument) {
       array_push($this->instruments, $instrument);
    }
    
    public function getInstruments() {
       return $this->instruments;
    }
    
    public function getBand() {
       return $this->$bandReference;
    }
    
    public function assignToBand(Band $band) {
      $this->$bandReference = $band;
    }
  
    public function getMusicianType() {
       return $this->musicianType;
    }      
    
    public function setMusicianType($musicianType) {
       $this->musicianType = $musicianType;
    }
    
  }
  
  
  class LeadGuitarist extends Guitarist {
    function __construct($last, $first) {
           parent::__construct($last, $first);
           $this->setMusicianType("lead guitarist");
    }
  }
  
  
  class RockBand implements Band {
  
    private $bandName;
    private $bandGenre;
    private $musicians;
  
    function __construct($bandName) {
       $this->bandName = $bandName;
       $this->musicians = array();
       $this->bandGenre = "rock";
    }
  
    public function getName() {
       return $this->bandName;
    }
           
    public function getGenre(){
       return $this->bandGenre;
    }
       
    public function addMusician(Musician $musician){
       array_push($this->musicians, $musician);
       $musician->assignToBand($this);
    }
    
    public function getMusicians() {
       return $this->musicians;
    }
  }
  
  
  class Guitar implements Instrument {
    
    private $name;
    private $category;
    
    function __construct($name) {
       $this->name = $name;
       $this->category = "guitar";
    }
    
    public function getName() {
       return $this->name;
    }
    
    public function getCategory() {
       return $this->category;
    }
  }
  
  // Test Objects
  $band = new RockBand("The Variables");
  $bandMemberA = new Guitarist("Jack", "Float");
  $bandMemberB = new LeadGuitarist("Jim", "Integer");
  
  $bandMemberA->addInstrument(new Guitar("Gibson Les Paul"));
  $bandMemberB->addInstrument(new Guitar("Fender Stratocaster"));
  $bandMemberB->addInstrument(new Guitar("Hondo H-77"));
  
  $band->addMusician($bandMemberA);
  $band->addMusician($bandMemberB);

  foreach($band->getMusicians() as $musician) {
    echo "Musician ".$musician->getName() . "<br>";
    echo "is the " . $musician->getMusicianType() . "<br>";
    echo "in the " . $musician->getBand()->getGenre() . " band <br>";
    echo "called " . $musician->getBand()->getName() . "<br>";
                  
    foreach($musician->getInstruments() as $instrument) {
       echo "And plays the " . $instrument->getName() . " ";
       echo $instrument->getCategory() . "<br>";
    }
    echo "<p>";
  }
?>